<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar
      title="登录"
      left-arrow
      left-text="返回"
      @click-left="$router.back()"
    />

    <!-- 登录表单 -->
    <van-form @submit="onSubmit" ref="loginForm">
      <van-field
        v-model="user.mobile"
        name="mobile"
        placeholder="请输入手机号"
        :rules="loginFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i slot="left-icon" class="iconfont iconshouji"></i>
      </van-field>
      <van-field
        v-model="user.code"
        name="code"
        placeholder="请输入验证码"
        :rules="loginFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="iconfont iconyanzhengma"></i>
        <template #button>
          <van-count-down
            v-if="isCountDownShow"
            :time="1000 * 60"
            format="ss s"
            @finish="isCountDownShow = false"
          />
          <van-button
            v-else
            class="send-sms-btn"
            round
            size="small"
            type="default"
            @click="onSendSms"
            native-type="button"
          >
            发送验证码
          </van-button>
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit">
          登录
        </van-button>
      </div>
    </van-form>
  </div>
</template>

<script>
import { login, sendSms } from '../../api/user'

export default {
  name: 'LoginIndex',
  data() {
    return {
      user: {
        mobile: '',
        code: ''
      },
      loginFormRules: {
        mobile: [
          { required: true, message: '手机号不能为空' },
          { pattern: /^1[3|4|5|8]\d{9}$/, message: '手机号格式不正确' }
        ],
        code: [
          { required: true, message: '验证码不能为空' },
          { pattern: /^\d{6}$/, message: '验证码格式不正确' }
        ]
      },
      isCountDownShow: false // 控制倒计时是否显示
    }
  },
  methods: {
    // 登录提交
    async onSubmit() {
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true, // 是否禁止背景点击
        duration: 0 // 展示时长(ms)，值为 0 时，toast 不会消失
      })

      try {
        const { data: res } = await login(this.user)
        this.$store.commit('setUser', res.data)
        this.$toast.success('登录成功!')
        this.$router.back()
        // console.log(res)
      } catch (error) {
        console.log(error)
        if (error.response.status === 400) {
          this.$toast.fail('手机号或密码错误!')
        } else {
          this.$toast.fail('登录失败，请稍后重试!')
        }
      }
    },

    // 发送验证码
    async onSendSms() {
      try {
        await this.$refs.loginForm.validate('mobile')
      } catch (err) {
        return console.log('验证失败')
      }

      this.isCountDownShow = true

      try {
        await sendSms(this.user.mobile)
        this.$toast('验证码发送成功')
      } catch (err) {
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送频繁,请1分钟后再试')
        } else {
          this.$toast('发送失败,请稍后再试')
        }
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container {
  .iconfont {
    font-size: 37px;
  }

  .send-sms-btn {
    width: 156px;
    height: 46px;
    line-height: 46px;
    background-color: #ededed;
    font-size: 22px;
    color: #666;
  }

  .login-btn-wrap {
    padding: 53px 33px;

    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}
</style>
